![]() Then, that point in space acted like a "virtual VOR" and you could twist your OBS and fly a course to or from that point. The way they worked is that you could enter up to four waypoints using frequency (of the VORTAC or VOR/DME), radial, and distance. I like 'em enough that if I bought a plane with one, I'd probably leave it in as the #2 nav. Not as easy as punching in direct-to, you definitely need a chart so you can plot out the reference points, but it's a pretty cool unit, really an advanced analog computer. I haven't shot an approach with a KNS 80 (though I'm tempted to do so now, while there are still a few left!) but I have flown direct on a cross-country flight with it. I don't know what the difference between the 80 and 81 was, but I've never actually seen an 81 in person or even in a picture in an airplane. There was no database on the KNS 80, and I'm not aware of any other VOR/DME RNAV units for small airplanes besides the KNS 81. And you didn't enter lat/long, you entered frequency/radial/distance. VOR/DME RNAV, suitable for use on the old KNS 80 for example. It does sound like the general opinion here is that what he did is not legal. ![]() I'm not out to get anyone in trouble so I won't mention the airport or date. ![]() Maybe I'm too anal/follower of the rules but this kind of thing really annoys me when other pilots "stretch" the rules like this and endanger the rest of us. Why do this if he had entered all the fixes into his 430? The part that makes me wonder too whether he did actually manage to enter all the fixes in is that he said he followed the approach on his iPad. I personally don't understand why he went to that trouble doing it manually when there was a perfectly acceptable circling approach. This is when he said that this happened to him as well but he just did the northbound RNAV by looking at the approach on his iPad (Foreflight) and then just manually entering the fixes into his GPS (let's say a 430). So I ended up doing the southbound RNAV approach and circling to land which was no big deal. I had just landed (ceilings were about 800 ft so just barely IFR) and commented to this particular pilot who was there that the northbound RNAV approach didn't appear in my G1000 which had the latest Nav data even though there were no NOTAMs saying it was out and it was in my Foreflight. I should fill in some more details after seeing some of the replies here.
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